<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>设置：</h1>
    <form action="/">
        <h3>背景</h3>
        <input type="radio">背景图片1
        <br>
        <input type="radio">背景图片2
        <br>
        <input type="radio">背景图片3
        <br>
    </form>
</body>
</html>